Twisting machine



Sept. 26, 1961 P. BoURGEAs 3,001,357

TwIsTING MACHINE Filed Nov. 17, 1959 3 Sheets-Sheet 1 Sept. 26, 1961 P. BouRGEAs TwIsTING MACHINE 5 Sheets-Sheet 2 Filed NOV. 17, 1959 m MM M Sept. 26, 1961 P. BoURGl-:As

TwIsTING MACHINE 5 Sheets-Sheet 3 Filed Nov. 17, 1959 3,001,357 TWISTING MACHINE Pierre Bourgeas, 110 Ave. Maurice Faure, Valence, France Filed Nov. 17, 1959, Ser. No. 853,492 Claims priority, application Luxembourg Nov. 25, 1958 Claims. (Cl. 57-62) The present invention relates to the twisting of preassembled yarns, i.e. of two or more yarns assembled on a common spool, more particularly in the case of yarns made of staple fibres, such, for instance, as cotton staples.

'Ihe object of the invention is an improved machine which allows obtaining twisted yarns or threads having larger windings than those that can be obtained, under comparable spindle speeds, on ring-spinning frames.

To this end, the invention has more specifically for its object a twisting machine of the throwing mill type, i.e. a machine of the type wherein the delivery system for the assembled yarns constitutes at the same time the twisting system, the novelty of which is constituted by the combination, for the delivering and twisting system, of a double flanged spool carrying the assembled yarns, preferably with equal flanges, with a stationary bell-shaped cover mounted on an element rigid with the machine framing, so as to surround coaxially the spindle carrying the feed spool, of which cover the upper section is provided with an opening or eye, which eye limits the balloon.

It is owing to such a combination of means that it becomes possible to get at the object of the invention, to wit: the execution of large windings with consumptions `of driving power which are acceptable when compared with the usual consumptions on ring-spinning frames, while the production is extremely uniform, and, in particular, no breakages occur as a result of the rising of the coils or layers on the feed spool and of differences in the twisting due to too large variations in the balloon. By reason of the fact that the feed spool revolves inside a stationary bell-shaped cover limiting the bulge of the balloon, the said balloon is practically submitted to almost no resistance by the surrounding air which is cut off by the cover. Consequently, a minimum of friction occurs in the assembled yarns on the feed spool, due to the fact that while the spool is rotating, the air is borne along with it inside the stationary bell-shaped cover. The disengagement of the yarns which is helped by the cutting off of the resistance of air on the balloon and 'of the friction of the yarns on the spool is still furthered by the presence of the upper flange of the spool which may then carry a winding having practically parallel coils or layers which will unwind in avery uniform manner.

According to a further feature of the invention, the twisting machine includes for each twisting unit, means adapted to receive and maintain the bell-shaped cover in position while it is removed from the delivery system, chiefly for changing the feed spool, said means transiently holding the ends of the assembled yarns of the new spool to be substituted for the exhausted spool, whereby said means further the threading through the upper eye of the bell-shaped cover and the piecing.

According to an embodiment, there corresponds to each twisting unit a rod fitted above said unit, rigid with a stationary section of the machine, and to which may be maintained the bell-shaped cover, said rod being provided with means for, on the one hand, holding the cover and, on the other hand, securing transiently the ends of the assembled yarns at the moment of the change of spool.

Further features and advantages of the invention will appear clearly in the reading of the following description of embodiments given by way of mere examples, which are by no means binding. In said figures:

FIG. l is an elevational side view of a twisting unit nited States Patent rice for a twisting or throwing mill, executed according to the invention.

FIG. 2 is a front elevational view thereof.

FIG. 3 is a diametrical sectional view showing the means for securing the cover on its support before the positioning of said bell-shaped cover.

FIG. 4 is a similar view, after the cover has been positioned.

FIG. 5 illustrates, also in diametrical cross-section, further means for securing the cover lon its supporting means, and

FIG. 6 is an elevational view of the spindle holding the cover while removed away from its support, chiefly with a view to changing the feed spool.

In said gures, 1 designates the spindle fitted in that part Z of the framing of the machine, termed the arch or vault, said arch carrying a series of such spindles. The spindle 1 is driven frictionally by a belt 3 tangent thereto over an arc of a short angular length; it carries and drives in its rotation the feed spool 4 which is provided with flanges 4a of equal sizes and on which the winding is of the kind with parallel joining layers or coils. Said bobbn 4 carries the assembled yarns, for instance two ends or more, of cotton or other like staples libres yarns. These assembled yarns 5 unwinding from the bobbn 4 form a balloon 5a and then, the twisted yarns or thread 5', after a change in direction as it passes over a tensioning device 6, comprising two braking bars 6a and 6b, is distributed by a thread guide 7 rigid with a reciprocating guiding bar 8 and wound over a winding roll 9 driven through longitudinal contact with a rotary cylinder 10. The numeral 11 designates the shaft of the take-up or rewinding system, the ends 12 of which shaft are freely revolvable and slidable in the grooves formed in the carried 13.

The twisting machine according to the invention is characterized by the fact that the combined delivery and feeding system includes, in combination with the feed spool 4- including equal ilanges 4a and on which the winding is performed with parallel coils or layers, a stationary bell-shaped cover 14 fitted on and secured to a support 15 rigid with the arch 2, said cover surrounding the spool 4 and being provided with an upper port or eye 14a through which the twisted yarns or thread 5a passes. Said cover adjusts, through its balloon-defining eye and, in combination with the upper spool flange 4a, the balloon 5a which is shielded thus from the resistance of air, the bobbn 4 carrying along with it a layer of air within which the balloon turns. Said cover plays furthermore the part of member for preventing double ends between the yarns of adjacent spindles.

The cover 14 may be held fast on the stationary support 15 through any suitable means. FIGS 3, 4 and 5 illustrate two possible securing means.

In the arrangement of FIGS. 3 and 4, the upper section 15a of the support is provided with two `annular grooves 1li-and 1-'7 and a rubber ring 18 may be urged downward'- ly by the cover when the latter is lowered into its support, ou-t of its upper groove 16 into the lower groove 17 so as to elastically lock then the cover in position- In the arrangement of FIG. 5, the support 15a is provided with sloping ribs 19, the number of which is four for instance while the cover 14 is provided with a corresponding number of similar sloping ribs 20 arranged in a manner such that, through a slight rotation of the cover round its axis, the ribs 20 are locked underneath the ribs 19 and hold thus the cover fast.

The cover 14 forms around the spool 4 a chamber inside which a iluid may be fed, for -instance atomized water, so as to suitably damp the assembled yarns subjected to twisting.

A further feature of the machine consists in the fac-t that there are provided for each twisting unit means for holding the cover when it is removed away from the delivery and twisting system and for furthering after a change of feed spool the threading of the fresh assembled yarns to be piecedwith the twisted yarn of the vexhausted s ool.

pln the embodiment illustrated in the drawings, (FIGS. l, 2 and 6), said cover-holding means include Ka guiding rod 21, for instance of rubber, provided near its upper end with an enlarged section 21a forming a knob for the cover and towards its lower end with a series of projections or studs 2lb. The shape of the knob 21a may be adjusted through a threaded rod 22 held fast coaxially inside the rubber rod 21 during its molding and `associated with a nut 22a adaptedrto modify, according to the requirements of adjustment, the'V outline of the groove 21C engageable by the upper eye 14a of the cover IA. The rod 21 is screwed through its threaded rod 22 inside an upper girder 23 (FIG. 2).

When the feed spool is being changed, the cover i4 is removed and caused to slide along the guiding rod 21 until it is locked inside the groove 21e. The cover occupies then the position 14' illustrated in dot-and-dash lines in FIGS. 1 and 2 and partly in FIG. 6.

For piecing purposes, the assembled yarns of the fresh Ifeed spool is wound by one or two turns for instance,

around the lower end of the rod'21 and is thus held by the studs 2lb.V When the cover 14 is taken ofIr the supporting rod 21 so( as to be returned into position over its support 15, the yarns are automatically threaded through the eye 14a.

The cover 14 may be made, for instance, of metal or of a suitable plastic material. Obviously, the invention is by no means limited to the particular embodiments given by way of a mere exemplication and it isv possible to imagine various modiiicationsand detail improvements and to use equivalent means for at least some of the means described without Widening thereby the scope of the invention as dened in the accompanying claims.

What l claim is:

l. In a twisting mill for the twisting of previously assembled yarns, the combination of a rotary spindle, a double flanged spool removably carried by said spindle to be controlled thereby and carrying a winding of assembled yarns, anormally stationary bell-shaped cover removably secured in coaxial relationship with the spindle to enclose the spool on the latter, said cover being provided at its upper end with an eye lying on the axis of the spindle above the spool and through which the twisted yarn is drawn off, the said assembled yarns unwinding from the spool forming -a balloon within the cover between the spool and said eye, an auxiliary support for the bell-shaped cover when removed away from its spoolenclosing position, and means carried by said auxiliary support for the transient attachment thereto of the assembled yarns carried by the new spool before insertion on the spindle.

2. In a twisting mill for the twisting of previously assembley yarns, the combination of a rotary spindle, a

double flanged spool removably carried by said spindle to be controlled thereby and carrying a winding of assembled yarns, a normally stationary bell-shaped cover removably secured in coaxial relationship with the spindle to enclose the spool on the latter, said cover being provided at its upper end with an eye lying on the axis of the spindle above the spool and through which the twisted yarn is drawn oli, the said assembled yarns unwinding from the spool, forming a balloon within the cover between the spool and said eye, a stationary vertical rod lying at a level above the normal location of the cover and over which said cover is adapted to be tted when removed away from its spool-enclosing position through engagement of the bell eye by the rod, means adapted to transiently secure said bell-shaped cover to the rod, and means carried at the lower end of the rod to secure thereto transiently the ends of the assembled yarns of a new spool to be fitted over the spindle, the transfer of the cover off the rod into its normal position around the spindle threading said ends of the assembled yarns of the spool through the upper eye in the cover, to allow their piecing with the ends of the twisted yarns which have precedingly been drawn off through said eye of the cover.

3. A device for temporarily holding a spool cover in an inoperative position, said device including an elongated rod of a material having the properties of rubber, said rod having an enlarged section adjacent one end of said rod adapted to be received in an eye of a spool cover for releasably supporting the latter on said rod with the latter extending substantially axially alongV the interior of said cover, and said rod having at an opposite end an exterior surface provided with irregularities so that a freshyarn can be releasably attached to said opposite end of said rod while the cover is removed from said rod and passed downwardly along the same and the yarn to an operative position covering a spool, whereby the yarn is automatically threaded through the eye of the cover.

4. A device as recited in claim 3 and wherein said irregularities are in the form of studs.

5. A device as recited in claim 3, said rod being fixed at said enlarged section thereof with an elongated threaded member extending coaxially beyond said rod, and a nut on said threaded member for engaging said enlarged section to regulate the conguration thereof.

References Cited in the le of this patent UNITED` STATES PATENTS 1,124,672 Stell et al. Ian. 12, 1915 1,822,194 Bauriedel et al Sept. 8, 1931 2,064,270 Rowe Dec. 15, 1936 2,644,029 Travis June 30,' 1953 2,745,239 Kingsbury May 15, 1956 FOREIGNV PATENTS Y 510,590 France Sept. 9, 1920 633,471 Germany July 28, 1936 

